Flywheel and method of balancing same



March 15, 1927.

J. o. CARREY FLYWHEEL AND METHOD OF BALANCING SAME A Filed cm. 15. 1924 Z fizlleiziol" do/zm 0; Currey #3 MM W Patented Mar. 15, 1927.

UNITED STATES 1,620,;871 PATENT OFFICE.

JOHN O. OARREY, OF ST. LOUIS, MISSOURI, ASSIGNOR TQ OARREY-ITORSE ENG iINEE'f a ING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURZII.

FLYWHEEL AND METHOD OF BALANCING SAME.

Application filed October 15, 1924. Serial .No. 743,811.

This invention relates to new and useful improvements in fly wheels and to a novel method for balancing the same.

The objects of the invention are to provide 'a fly wheel which can be easily and quickly balanced in a simple and economical manner.

Further objects of the invention are to provide a method for balancing fly wheels 1 and other revoluble members, which method is accurate and economical and can be easily practiced. h

With these and other-objects in view, my

invention consists in certain novel features of construction and arrangement ofparts, hereinafter more ifull y described and claimed, and illustrated in the accompanying drawings, in whichp p A 1 igure 1 is an endlevational view of a fly wheel partly broken away to more clearly illustrate ith einventi'on.

Fi re 2 is'a vertical -"cross section taken longitudinally through the fly wheel,

Figure 3 is a perspective tfdetail view of or: (if the weights used ifor'ibalancing the w ee In order to obtain a perfectly balancedflywheel and other revoluble members operating at high speed, itfisnecessary totest each wheel and performoperations thereon to @remove surplus material from the heavy portions thereof. Heretofore in balancing fly wheels and other revoluble parts, it has been customary to remove a portion from the heavy partof the wheel by drilling or in any other'suitable manner. This method is expensive and unreliable as it requires time and labor zand is unsatisfactory for the reason that too, much material may be removed from one spot, requiring further operations on the wheel.

By my novel method .the fly wheels and other revoluble objects can be easily balanced'without requiring machine operations and a great deal of time and labor.

' Referring by numerals to the accompanying drawings, 10 indicates a fly wheel having a ring 11. This fly wheel is Provided with a concentrically arranged groove 12 referably formed in the inwardly disposed ace 14 of ring 11. A plurality of weights or blocks 15 of the re uired dimensions are formed of lead or ot er suitable material and are adapted to be inserted in said groove 12. This groove is preferably undercut or movement-of said blocks therein.

dove-tailed' in cross section, as indicated at 16, and each "block .15 is preferably formed on one side with a longitudinally disposed V-shapedgroove 17, thereby forming in one face of said Eblock outwardly presented portions 18 which, whenpressurefi'saapplied to the opposite face of said block, are adapted to be fiare'd outwardly. I

toward the inclined walls 16 of groove 12,

thereby securing said blocks against displacement. from said groovebut permitting The wheel is fixed to a shaft 19 and the latter is placed on balancing weights 20 so that said wheel can revolve freely on said supports. The blocks 15 are now moved insaid groove until the wheel is in perfect balance whereupon said blocks are firmly seated in their positions by applying pressure in any. suitable manner to each block, causing portions 18 thereof to fully expand against the'undercut walls- 0f said groove and thereby be firmly seated in position.

To find the balance of the wheel, one weight or block, such as A,.is firmly seated 'in the u per portion of the wheel and blocks B andare arranged in the lower portionof said wheel. Blocks B and are now adjusted independentlyof each other so as to bring block A in vertical plane with the vertical axis of the wheel as indicated :at X-X in'Figure 1. Blocks B and C are ad'usted independently of eachQother in order to take care of air holes which may have been formed in the casting and are hidden from view and which would affect the balance of the wheel. Consequently, when properly' balanced, blocks B and C may not necessarily occupy equidistant positions from line XX butthe distances between the respective blocks and said line may vary as in icated in Figure 1 by lines Y and Z. j

When the wheel is in perfect balance, blocks are fixed permanently in their ,res ective ositions b applying pressure to the inwai dly dispos ed faces thereof. The 110 blocks thus seated are held against displacement and the groove being formed in the inwardly disposed face of the rim of the wheel, said blocks are not affected by centrifugal action while the wheel is running at high speed.

A wheel of my improved construction can be easily balanced by adjusting the blocks in the groove of said wheel and no machining, such as drilling, is required, and the wheel can be brought to proper balance Without removing it from the balance weights, thereby eliminating loss of time and labor heretofore necessary for such work. i

My novel method of balancing the wheels is accurate, can be easily practiced, requires no expensive operations or labors, and in+ sures quick and efiicient results.

I claim: u

1. A balanced wheel comprising a flanged wheel provided in its inwardly disposed face with an undercut annular groove, and a plurality of blocks of metal adjustable in said groove to bring said wheel in balance, said blocks being adapted to be fixed in adjusted position by applying pressure thereto causing them to spread laterally in engagement with the walls of said groove.

2. A balanced wheel comprsing a flanged wheel, the inner periphery of said flange being provided with an annular undercut groove and a plurality of blocks adjustable in said groove to balance said Wheel, said blocks being recessed whereby pressure applied to said blocks'will cause them to expand against the undercut side walls of the semen groove, thereby fixing said blocks in adjusted positions.

3. In a device of the class described, a revoluble member provided with a circular flange, there being an undercut groove formed in the inner face of said flange and a plurality of metal blocks in said groove adapted to be arranged in spaced relation therein to balance said member, said blocks being provided with laterally extensible portions whereby by applying pressure to said blocks said portions are spread laterally against the side walls ofsaid groove, thus permanently fixing said blocks in adjusted positions.

5. In a device of the class described, a block of soft metal adapted to be inserted in a concentric groove of a wheel, said block being provided in one face with a longitudinalll-shaped recess whereby pressure applied to the other face of said block will cause the sides thereof to'expand laterally in frictional engagement with the side walls of said groove.

In testimony whereof I hereunto aflix my signature this 11th day of October, 1924.

Jenn o. CARREY.

described, the 

